Gas valve



March 24, 1953 c. c. LAMAR 2,632,469

GAS VALVE Filed Nov. 15: 1946 5 Sheets-Sheet 1 J zwewa 290w Law/a awMarch 24, 1953 5, C, LAMAR 2,632,469

GAS VALVE Filed Nov. 15, 1946 3 Sheets-Sheet 2 42 Z- OFF I 4 5mm? March24, 1953 c. c. LAMAR 2,632,459

, GAS VALVE Filed Nov. 15, 1946 s Sheets-Sheet s ANDLL' PuszrlozvISIMMER Patented Mar. 24, 1953 GAS VALVE Charles C. Lamar, Chicago,Ill., assignor of onefourth to Philip S. Harper and one-fourth toCarolyn L. Harper, both of Chicago, Ill., and one-fourth to Harris Trustand Savings Bank, an Illinois banking corporation, Chicago, 111., astrustee of the Philip S. Harper Trust, and one-fourth to said HarrisTrust and Savings Bank as trustee of the Carolyn L. Harper TrustApplication November 13, 1946, Serial No. 709,466

11 Claims.

The present invention relates to gas valves and particularly to gasvalves for use with gas burners having I two burner sections. Burners ofthis character are commonly called double burners and thetwo burnersections are called the main and simmer burner sections.

Gas valves for double gas burners have heretofore been constructed andarranged to supply gas selectively to the two burner sections and alsoin selected quantities. For instance in a known type of valve, such asthat disclosed in the Philip S. Harper Patent No. 2,299,624, grantedOctober 20, 1942, the valve is operable into distinct operatingpositions, as follows:' (1) a full I on position, wherein gas issupplied to both the burner sections at maximum rates determined istoprovide anew and improved gas valve for a double gas burner, i. e., anew and improved double gas valve.

Another object of the present invention is to provide a new and improveddouble valve including asimplified arrangement enabling the supply of apredetermined and adjustable small quantityof gas to the simmer burnersection, and more particularly, wherein said means includes anadjustment accessible through a hollow valve stem.

. A further object of the present invention is to provide a new andimproved double valve which does not require any auxiliary drillings inthe valve body, which in the past have been of a complicated and deviousangular nature.

, A further object of the present invention is to provide a new andimproved double gas valve operable into the various positions referredto heretofore with a minimum rotation of the valve plug and yethavingadequate sealing surfaces insuring against leakage of gas. 1 .Afurtherobject ofthe present invention is to, provide a new and improveddouble gas valve of the character set forth above in which the main gaspassageways in the valve body and plug can be drilled radially andsimultaneously, thereby to insure accurate alignment of the passages inthe full on position of the valve and also to acter It.

decrease the length of the arc subtended by the passageways in both thevalve body and plug, thereby to provide good seals without increasingthe overall length of the valve plug. a

A further object of the present invention is to provide a new andimproved double gas valve including stem adjustment means for regulatingthe quantity of gas passed in the low simmer position which is soconstructed and arranged that gas does not escape through it in areverse direction.

Other objects and advantages of the present. invention will becomeapparent from the ensuing description of a preferred embodiment of thegas valve, in the course of which reference is had to the accompanyingdrawings, in which:

Fig. 1 is a fragmentary top plan view, partly: broken away, of a gasvalve embodying the pres,- ent invention, the valve being illustrated inits off position;

Fig. 2 is a fragmentary enlarged axial crosssectional view taken alongthe line 2-2 of Fig. 1;

Fig. 3 is a transverse cross-sectional view taken. along the staggeredline 33 of Fig. 1, and like-' wise illustrating the valve in its 011position; I

Fig. 4 is a transverse cross-sectional view taken along the staggeredline 44 of Fig. 1 and illus-l trating the valve in its simmer position;I

Fig. 5 is a view along the same section line as, Fig. 3, illustratingthe valve in its full on position;

a Fig. 6 is a transverse cross-sectional view taken,

along the staggered line 6-6 of Fig. 1 and illus-' trating the valve inits low simmer position;

Fig. 7 is a fragmentary axial cross-sectional View taken along the line'i'! of Fig. 6; and

Figs. 3A, 4A, 5A and 6A are flat developments of the valve body andvalve plug surfaces in the positions corresponding to those in whichthese are shown in Figs. 3, 4,- 5 and 6. By flat developments are meantthe surfaces developed by rolling the conical surfaces of the valvechamber and plug upon a plane surface. The plug surface is shaded andthe body surface is unshaded.

Referring first more particularly to Figs. 1' and 2, the double gasvalve of the present inven-' tion is indicated as a whole by referencechar- It comprises a valve body l2 having a chamber with a conical innersurface [4 and within which is mounted a rotatable control mem-. berillustrated as the tapered or conical plug 16.

The plug is provided with an axial passageway l8 providing communicationbetween the interior;

of the valve plug and the valve chamber 20, which includes the earlierreferred to conical surface [4. The plug is provided also with first andsecond main passageways 22 and 24, which, in accordance with one of theimportant features of the present invention, are truly radial relativeto the axis of the plug and the chamber 20 and which are readily drilledwith the plug within the valve body when the plug is in its full onposition'so that they register exactly with the gas inlet and outletpassageways 2B and 28, respectively, in the valve body, as bestillustrated in Fig. 5.

The radial disposition not only enables the passageways to b drilledreadily but the arrangement also reduces to a minimum th length of thearc at the intersections of the passageways with the inner surface M ofthe chamber 29 and the outer surface of the plug 16. This is animportant factor in that the passagewayscan be spaced closer togetherboth axially aswell as radially, thereby to decrease the angularmovement of the. plug required to move it between its various positionsas well as decreasing the overall length of the plug.

The valve plug, in accordance with another feature of the presentinvention, is provided with further passageway 30 through which a smalland adjustable quantity of gas is supplied to the simmer burner sectiononly in the low simmer position of the valve. The passageway has anenlarged radial portion 32 near the outer surface of the plug and anaxially inclined inner portion 34 leading to the hollow 36 of the valvestem 33. The inner portion 34 of the auxiliary passageway communicateswith an annular passageway 58 defined by the stem and an annular recess42 in a stem adjustment auxiliary valve providing insert 44 which maytake various forms and which is illustrated as being of the characterdisclosed and claimed in the copending application of Vincent 0.Peterson, Serial No. 600,795, filed June 21, 1945 (now Patent No.2,590,569, granted March 25, 1952).

The stem adjustment insert includes a rotatably adjustable secondaryvalve member at having a slot 48 at its outer end whereby it is readilyaccessible for adjustment through the hollow of the stem by a suitableinstrument such as a small screw driver. When the valve member at isrotated the quantity of gas flowing to the central axial passageway I 8in the valve plug, and thus to the simmer section of the burner, isregulated by control of the effective size of an orifice including anaperture 52 in the insert 44 and a cooperating passageway 54communicating with the interior of the valve plug through an axialpassageway 58 at the inner end of the auxiliary valve 4'6.

The stemadjustment means is provided with a seal 58 at its outer endpreventing escape of gas therethrough. The seal is comprised of anannular groove 60 in the valve member 36, which is filled with lubricantand an annular indentation 62 in the thin walled outer portion 6-! ofthe insert 44. The stem adjustment means is preferably preassembled inthe form in which it is shown and then inserted into the enlargedportion 36A of the hollow 36 of the stem.

"The valve plug'includes an auxiliary passagewayfiihaving an enlargedouter end 66, for a purpose to be described hereinafter.

' The valve plug is rotatable by a handle 68 which is secured to thehollow valv stem 38 in suitable manner. The latter is preferablyprovided with a fiat side 10, giving the valve stem 2. generallyD-shaped configuration fitting into an opening of similar configurationin the valve handle, whereby the two are readily assembled in operativerelation with each other.

Gas is supplied to the valve through the inlet passageway 28, which isformed in an externally threaded transverse boss 12 adapted forattachment to the usual gas supply manifold (not shown). The valve bodyis also provided with a pair of longitudinally extending spaced apartexteriorly threaded'bosses 14 and 16, which are drilled to form gasoutlet passageways l8 and 86 through which gas is supplied to the simmerand main burner sections, respectively, of a double gas burner.Passageway l8 communicates directly .with chamber 20 and the aXialpassageway 58 in the valve plug, whereas passageway communicates withthe previously referred to outlet passageway 28. The latter is, asalready indicated, radial, and after drilling it is closed by a plug 82.Adjustably mounted hoods 84 and 86, provided with orifices andcooperating with fixed needle valves secured to the valve body (notshown, but which may be of conventional construction) are secured to theouter ends of bosses l4 and is to provide nozzles through which gas issupplied to the burners at suitable velocities when the valve is in itsfull on position.

The valve may have and is shown as including a position determining andindicating mechanism Eli! which includes a plate 92 having a limitedextent of angular movement with respect to the valve stem, a plate '94secured to the valve body by the spaced apart screws 96, and a spring 93bearing against the outer end of the valve plug and against the plate92, thereby forcing the latter against the stationary plate 94. Thespring thus holds the valve plug tightly in place and also biases theplate 92 against the plate 9%, thereby to provide the necessary movementof the latter for audibly indicating certain positions of the valve. Thevalve body is also provided with an axially extending portion I00providing stop surfaces against which a part of the plate 92 moves todetermine the closed and open positions of the valve. Only the full onstop surface 602 may be seen in the drawings and it is shown only inFig. 1. The particular form of the position indicating and determiningmechanism forms no part of the present invention and it may be of thecharacter disclosed and claimed in the Turner et a1. Patent No.2,299,666, gra'ntedOctober 20, 1942.

In order to provide a double gas valve capable of'being operated intothe many positions required for adequate control of double gas burnerswith a minimum of angular movement and hav ing a minimum length and yethaving the requisite valve plug sealing surfaces, certain of thepassageways are displaced axially as well as angularly. For instance,the inlet and outlet passageways 26 and 28 are axially displaced (aboutone-eighth inch) as are the passageways 22 and 2s, which as previouslyindicated are in the same planes as passageways 26 and 28, respectively.They are also displaced angularly a distance of about 104 degrees. Theauxiliary passageway 65, which constitutes a bypass-preventingextinction of the flames when the valve is operated between the full onand simmer positions, and the low adjustment passageway 39 are alsodisplaced relative to the main passageways in the gas valve, as will beperhaps more apparent when reference is had to Figs. 3A to 6A in thefollowing description. of the operation of the valve. The auxiliarypassageway 65, 66 is located angularly between the first and secondradialpassageways 22 and 24, somewhat nearer the first, and its axis isdisplaced axially about one-sixteenth inch from the axis of thepassageway 22 and three-sixteenths inch from passageway 24. The axis ofthe inlet portion 32 of further passageway 30 is angularly displacedabout 150 degrees from the first passageway 22 and axially displacedabout one-quarter inch from theaxis of the second passageway 24.

The axial location of the low adjustment passageway 30, in accordancewithanother important feature of the invention, is such that it doesregister only with the inletpassageway 26 and never with the outletpassageway 28. Consequently, there is no undesired flow of gas topassageway 28 in any position of the valve. The closest approach ofpassageways 28 and 30 is about one-sixteenth inch so that an adequategas seal is provided.

, In the accompanying descriptionof the operation of the valve as awhole, reference will be had particularlyto Figs. 3 to 6 and 3A to 6A,both inclusive. v

Infthe off position of the valve illustrated in Figs; 3 and 3A the inletpassageway 26 is closed by the imperforate part of the valve plug l6. Inthis position of the valve, the valve handle extends downwardly, thefiat side 10 of the valve stem is at the bottom and the handle can beturned only in a counterclockwise direction as viewed from the right ofFig. 1, or in a clockwise direction as viewed in Figs. 3 to 6, also thesolid line elements of Figs. 3A to 6A, inclusive, which represent thevalve plug can only be moved counterclockwise as viewedin the latterfigures.

Thedouble. gas valve is constructed and arranged to provide an audibleindication when the valveis moved. to its simmer position, to whichposition it is usually turned for lighting purposes.

The valve is shown in the center of this position in Figs. 4 and 4A. Inthis position the inlet port 26 intersects the passageway 24 to thegreatest extent and gas is supplied to .the simmer section of the burnerthrough the axial passageway l8 in the valve plug and passageway 18. Atthis time the gas fiow to the simmer section is determined by the sizeof the orifice in the hood 84. Adjust-1 ment of the flow of gas to thesimmersection alone may be efiected by movement of the valve plugto varythe extent of registry between the passageways 24 and 2B.

The valve may beoperated from the simmer position to the full onposition by further counter clockwise movement of the valve plug asviewed in Figs. 3A to 6A. The full on position is shown in Figs. 5 and5A from which it will be noted that the inlet passageway is fullyaligned with the passageway 22 and that the passageway 24qis alignedwith the outlet passageway 28 which communicates with the main burneroutlet passageway 80. The axial passageway l8 of the valve plug remains.in communication with the simmerburner section through outlet passageway18. In this position the passageways 30 and 65 are closed. a

A turn down range of operation in which manually regulatable quantitiesof gas are supplied to both the main and simmer sections is locatedbetween the full on and simmer only sections. For instance, in movementof the valve from its full on to its simmer-only position, the extent ofregistry between the passageways 22 and 26 and the auxiliary passageway65, 86 begins to register with the inlet passageway and is the onlypassageway registering with the inlet passageway fora time before thesimmer only position is reached, at which time passageway 24 registerswith the inlet passageway 26. The passageway 65 thus supplies a smallquantity of gas to both the main and simmersections first and then tothe simmer section only as the simmer only position is reached. It thusprevents the extinction of the flames and especially of the flame to thesimmer burner section when the valve is operated from its full on to itssimmer position. In order too-perate the valve to the low simmeposition, the valve is moved clockwise as viewed in Figs. 3A to 6A'fromthe-simmer position to bring the auxiliary passageway 30 into registrywith the inlet passageway 26. Passageway 30 begins to register with theinlet passageway before the passageway 24 moves out of registrywith theinlet passageway sothat both supply gas to the simmer section for a timeand finally gas is sup-- plied to the simmer section only throughtheauxiliarypassageway 32, 34, as best illustrated'in Fig. 6A. i

The quantity of gas supplied to the simmer burner section in the lowsimmerposition may be adjusted readily by moving the handle 68 andturning the secondary valve member 46 to control the effective size ofthe opening or orifice defined by the openings 52 and in the insert 44and valve member 46, respectively. a 4 From the foregoingdetaileddescription of the construction and operation of the double gas valve ofthe present invention, it may be noted that the valve may be constructedsimply and economically and that it may be operated simply and,furthermore, the quantity of gas supplied to the simmer burner sectionmay be regulated with a great degree of nicety by the stem adjustmentmeans. Only a limited angular extent of movement is necessary to movethe valve betweenits many positions, this movement being only about 195degrees. The staggering of the ports in different axial planes also notonly reduces the extent of angular movement but it also keeps down theoverall length of the valve plugand, therefore, of the valve as a whole.Also, the nonregis-' trability of the stem adjustment passagewayandpassageway 28 prevents undesired flow of gas to the main burner section.a

While the invention has been described in con- 'nection with thespecific details of one embodiment, it should be understood that thesevdetails between 24an'd is reduced, thereby to reduce are intended to beillustrative and not limitative of the invention except in so far as setforth in the accompanying claims. a I j What I claim as new and desireto secure by United States Letters Patent is: I

1. A double gas valve for us with double ga burners of the type havingmain and simmer burner sections, including in combination, a valve bodyhaving a plug receiving chamber and a pair of outlet passageways adaptedto supply gas to the simmer and main burner sections of the burnerrespectively, the simmer burner section outlet passageway communicatingwith said chamber and the main burner section outlet passageway Way, avalve 'plug ro-tatably' mounted'in said chamber, said plug having avalve stem, an axially 7 disposed passageway open to said chamber an ahollow portion extending through the valve Stem to said'axial'passageway, said plu having also first and-second radial passagewaysleading from the exterior of the said plug to said-axial passagewaywhich are aligned with said inlet passageway and said radial portion ofsaid main burner section outlet passageway in the full on position ofthe plug, said plug having also an auxiliary passageway located betweensaid first and second passages which is axially displaced from both saidfirst and second passageways and which provides communication betweenthe inlet pa sa way and said axial plu passageway when the portion ofthe valve plug between-said first and second passageways is in theregion of the inlet passageway, and said plug havin also a furtherpassageway, the inlet end of which is axially and angularly displacedfrom all said other-passage-v ways and which extends to said hollowportion, and means including regulatable orifice defining structure insaid hollow portion and accessible through the stem providingcommunication from said further passageway to said axial passageway.'2.=A double gas valve for use with double a burners of the type havinmain and simmer burner sections, including in combination, a valve bodyhaving a plug receiving chamber and a pair of outlet passageways adaptedto supply gas to the simmer and main burner sections of the burnerrespectively, the simmer burner section outlet passageway communicatingwith said chamber and the main burner section outlet passagewayincluding a radial portion leading to said chamber, said body havingalso a radial inlet passageway leading to said chamber displaced bothangularly and axially with respect to said radial portion of the mainburner section outlet passageway, a valve plug rotatably mounted in saidchamber, said plug having a valve stem, an axially disposed passagewayopen to said chamber and a hollow portion extending through the valvestem to said axial passageway, said plug having also first and secondradial passageways leading from the exterior of said plug to said axialpassageway which are aligned with said inlet passageway and said radialportion of said main burner section outlet passageway in the full onposition of the plug, and said plug having also a further passageway,the inlet end of which is axially and angularly displaced from all saidother passageways and which extends to said hollow portion, and meansincludin -orifice definingstructure in said hollow portion providingcommunication from said further passageway to said axial passageway. 3.-A double gas valve for double 'gas burners havingmain and simmersections and operable to full on, simmer and low simmer positions inwhich positions gas is supplied to both burner sections, to the simmeronly at a high rateand to the simmer only at a low rate, respectively,including in combination, a valve body having a, pai of angularly spacedapart passageways, a rotatable valve plug having an axial passageway, apair of passageways leading from the surface of said plug to said axialpassageway and which are aligned with said first pair of passageways inthe full on position of the valve, the angular location of saidpassageways being such that in another position, the simmer position,one of said passages in the plug provides communication between theinlet and axial passageways in the body and plug, respectively, and saidplug having a further passageway of adjustable restricted effective arealeading from its surface to its axial passageway and angularly spacedfrom the others so that it provides communication between said inlet andaxial passageways in the low simmer position of the valve, said alignedinlet. and one of said pair of plug passageways being axially spacedfrom said aligned outlet and the other of said pair o plug passagewaysand said further passageway being axially spaced from the otherpassageways.

4. A double gas valve for double gas burners of the type including mainand simmer burner sections characterized in that it includes a valvebody having gas inlet means and main and simmer burner outlets, and arotatable valve element movab-ly mounted in the valve bodyand'controlling the connections between said inlet means and saidoutlets and having a hollow stem, said element having a first passagewaybetween th gas inlet means and simmer burner outlet including adjustablegas flow limiting means accessible for adjustment through said stem forsupplying a low quantity of gas to the simmer burner outlet in oneposition of the element, means including a second passageway in saidelement and between the gas inlet means and simmer burner outlet havinga portion registrable with the gas inlet means for supplying a largerquantity of gas to said simmer burner outlet in another position of theelement, and means including another passageway between the gas inletmeans and bo burner outlets for-supplying gas to both outlets in afurther position of said element, said p sageway including said portionin registry with said main burner outlet. I a

5. A double valve for double gas burners of the type including main andsimmer burner sections, including in combination, a valve body with aninlet passageway and main and simmer burner outlet passageways, and arotatable valve plug mounted in said body and controlling theconnections between said inlet passageway and said outlet passageways,said valve plug including an axial passageway communicating with thesimmer burner outlet passageway, a hollow stem communicating with saidaxial passageway, means including a first transverse passagewayconnecting the axial passageway to the exterior of said valve plug andincluding a portion registrable with the inlet passageway in oneposition of the plug, and auxiliary valve means controlling the flow ofgas through said passageway and adjustable through the stem forconnecting said inlet passageway to said simmer burner outlet passagewayin said one position of the valveand supplying a low but regulat'ablequantity of gas to the simmer burner section, means including said axialpassageway and another transverse passageway in said plug angularlydisplaced from said first passageway and including a portion registrablewith said inlet passageway in another position of the valve forconnecting said inlet passageway to said axial passageway and simmerburner outlet passageway in said other position of the valve andsupplying a larger quantity of gas to said simmer burner section, andsaid valve plu including also passageways extending from said axialpassageway to the exterior of the plug for connecting said inletpassageway to both said simmer and main burner outlet passageways in afurther position of the valve.

6. A double valve for double gas burners of the type including main andsimmer burner sections, including in combination, a valve body with aninlet passageway and main and simmer burner Outlet p s a eway and arotatable valve plug let passageways, said valve plug including a firstsystem'of passageways including an axially extending passageway, ahollow stem and auxiliary valve. means controlling the flow of gasthrough said system of passageways and adjustable through the stem forconnecting said inlet passageway to said simmer burner outlet passagewayin one position of the valve and supplying a'low but regulatablequantity of gas to the simmer burner. section, a sec- .ond system ofpassageways in said pluginclud-- ing said axially extending passagewayand effectively'angularly'displaced from said first system forconnecting said inlet passageway to said simmer burner outlet passagewayin another position of the valve and supplying a larger quantity of gasto said simmer burner section, and a third system of passagewaysincluding said axially extending passageway and effectively angularlydisplaced from said other systems for connecting said inlet passagewayto both said simmer and main burner outlet passageways in a further po-7 sition of the valve.

'7. A double gas valve of the type operable to one position to supply afirst quantity of gas to the main and simmer burner sections of a doublegas burner and to a second position to supply a smaller predeterminedquantity of gas to the simmer section only characterized in that itincludes a'valve body having a gas inlet passageway and main and simmerburner outlet passageways, and a rotatable valve plug mounted in saidvalve body and controlling the connections between said inlet and outletpassageways and including an axially extending passageway and a hollowstem, said body and plug each having a pair of angularly spaced apartand interconnected passageways which are aligned in said one position,said passageways in said valve body being the gas inlet passageway andthe main burner section outlet passageway and the passageways in saidplug communicating with said axially extending passageway, and saidaxially extending passageway communicating with said simmer burnersection outlet passageway, and means including said axially extendingpassageway and a further passageway in said plug effectively angularlyspaced from the other passageways in said plug and adapted to connectsaid gas inlet only to the simmer burner section in said secondposition, and means in said further passageway adjustable through saidhollow stem controlling the flow of gas through said further passagewayfor supplying said smaller predetermined quantity of gas in said secondposition. 7

8. A double gas valve for double gas burners of the type including mainand simmer burner sections characterized in that it includes a valvebody having gas inlet means and main and simmer burner outlets, and arotatable valve element movably mounted in the valve body andcontrolling the connections between said inlet means and said outlets,said movable valve element having a first passageway between the gasinlet means and simmer burner outlet including flow limiting means forsupplying a low quantity of gas to the simmer burner outlet in oneposition of the element, means including a second passageway in saidelement between the gas inlet means and simmer burner outlet forsupplying a larger quantity of gas to said simmer burner outlet inanother position of the element, and means including passageways otherthan said first passageway in said element between the gas inlet meansand bothburner outlets for supplying gas to both said simmer and mainburner outlets in a further position of the movable. element and in arange between said other and furtherpositions.

9. A double gas valve, including'in combination, a valve'bodyha'ving apair of radial an.- gularly and axially spaced apart passageways, one ofwhich constitutes an inlet and the other a first burner outletpassageway, anda rotatable valve plug mounted in'said body incooperative relation to said inlet and outlet passageways andcontrolling ;theqfiow of gas between them, said plug having an axialpassageway adapted to communicate with a second burner outletpassageway, a pair of radial passageways communicating with said axialpassageway and of which the first is aligned with said inlet passagewayand said second is aligned with said outlet passageway in one positionof the valve, said second passageway also being aligned with said inletpassageway in a second position of the valve plug, and a furtherpassageway including flow predetermining means in said valve plug andangularly and axially spaced from the others and extending from theexterior of the valve plug to said axial passageway and adapted in athird position of said valve to connect said inlet and axialpassageways, the axial spacing of said further passageway at theexterior of the valve plug being such that it cannot register with thefirst burner outlet passageway in any position of said plug. 7

10. A gas valve having a valve body with axially and angularly spacedapart inlet and outlet passageways, and a rotatable valve plug mountedin said body for controlling connections between said inlet and outletpassageways, said plug including first and second axially and angularlyspaced apart passageways which are substantially aligned with said inletand outlet passageways, respectively, in one position of said plug, theaxial spacing being such that in another position of said plug saidsecond passageway is registrable with said inlet passageway, and saidplug including a further passageway having an inlet end at the exteriorof the plug which is angularly displaced from the others and which isalso axially displaced from said inlet and first passageways in adirection opposite to the displacement of said outlet and secondpassageways, the axial displacement of said further passageway beingsuch that it is registrable with said inlet passageway in a furtherposition of said plug but such that it does not register with saidoutlet passageway in any position of said plug.

11. A gas valve having a valve body with axially and angularly spacedapart inlet and outlet passageways, and a rotatable valve plug mountedin said body for controlling connections between said inlet and outletpassageways, said plug including an axial passageway and first andsecond axially and angularly spaced but.

passageways in a direction opposite to the displacement of said outletand second passageways,

the axial displacement of said further passageway being such that it isregistrable with said inlet passageway in a further position of saidplug but such that it does not register with said outlet passageway inany position of said 'plu CHARLES C. LAMAR.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 471,799 LeibmanMar. 29, 1892 1,763,305 Heidbrink Jan. 10, 1930 2,249,982 RutherfordJuly 22, 1941 2,252,134 Mueller Aug. 12, 1941 2,257,886 Mueller Oct. ,7,1941 2,299,624 Harper Oct. 20, 1942 2,299,666

Turner Oct. 20, 1942

